package com.fleetdm.agent.scep

import com.fleetdm.agent.GetCertificateTemplateResponse
import org.junit.Assert.assertNotNull
import org.junit.Assert.assertTrue
import org.junit.Assert.fail
import org.junit.Before
import org.junit.Test
import kotlinx.coroutines.test.runTest

/**
 * Unit tests for ScepClientImpl.
 *
 * Note: These tests validate the structure and error handling.
 * Full integration testing with a real SCEP server should be done separately.
 */
class ScepClientImplTest {

    private lateinit var scepClient: ScepClientImpl

    @Before
    fun setup() {
        scepClient = ScepClientImpl()
    }

    @Test
    fun `enroll with malformed URL throws ScepNetworkException`() = runTest {
        val template = createCertificateTemplate(url = "http://[invalid")

        try {
            scepClient.enroll(template)
            fail("Expected ScepNetworkException to be thrown")
        } catch (e: ScepNetworkException) {
            assertTrue(e.message?.contains("Invalid SCEP URL") == true)
        }
    }

    @Test
    fun `enroll with invalid subject throws ScepCsrException`() = runTest {
        val template = createCertificateTemplate(subjectName = "invalid-subject-format")

        try {
            scepClient.enroll(template)
            fail("Expected ScepCsrException to be thrown")
        } catch (e: ScepCsrException) {
            assertTrue(e.message?.contains("Invalid X.500 subject name") == true)
        }
    }

    @Test
    fun `enroll with unreachable server throws ScepNetworkException`() = runTest {
        val template = createCertificateTemplate(
            url = "https://invalid-scep-server-that-does-not-exist.example.com/scep",
        )

        try {
            scepClient.enroll(template)
            fail("Expected ScepNetworkException to be thrown")
        } catch (e: ScepNetworkException) {
            assertTrue(e.message?.contains("Failed to communicate") == true)
        }
    }

    // Helper function
    private fun createCertificateTemplate(
        url: String = "https://scep.example.com/cgi-bin/pkiclient.exe",
        subjectName: String = "CN=Test,O=Example",
        scepChallenge: String = "secret",
    ): GetCertificateTemplateResponse = GetCertificateTemplateResponse(
        id = 1,
        name = "test-cert",
        certificateAuthorityId = "ca-123",
        certificateAuthorityName = "Test CA",
        createdAt = "2024-01-01T00:00:00Z",
        subjectName = subjectName,
        certificateAuthorityType = "SCEP",
        status = "active",
        scepChallenge = scepChallenge,
        fleetChallenge = "fleet-secret",
        keyLength = 2048,
        signatureAlgorithm = "SHA256withRSA",
        url = url,
    )

    // Note: Testing successful enrollment requires a mock SCEP server or extensive mocking
    // of jScep's Client class. Integration tests should be used for this scenario.
}
